Bag corner stitching machine



NOV. 21, 1933. F cKs 1,936,460

BAG CORNER STITCHING MACHINE Filed May 5, 1932 Wiiness E2120? PatentedNov. 21, 1933 UNITED STATES PATENT OFFICE 1,936,460 BAG CORNER STITCHINGMACHINE Application May 6, 1932, Serial No. 609,673, and

in Great Britain June 4, 1931 4 Claims.

This invention relates to bag cornersewing and like operations and isconcerned particularly with machines, for example of the type describedp in applicants pending application Serial No. a 550,255, filed July 11,1931, which have external work supporting means adapted to providesupport to faces of parts being sewn together at a right angle to oneanother and an internal worksupporting plate adapted to pass between theedges of the parts and engage the internal faces of the parts to supportthem against the thrust of the awl and needle.

In the sewing together of parts of certain forms F of bags, by acontinuous scam, the beginning and end of which overlap to lock thestitches, it is necessary to withdraw the internal work-supporting platefrom between the edges of the parts of the bag being sewn together sothat the seam may be completed and overlapped.

' It is one of the several objects of the present invention to providefor the withdrawal along the line of feed, of an internalwork-supporting plate such as above referred to when desired by theoperator.

2 The nature of the present invention will become fully apparent tothose skilled in the art from a consideration of the followingdescription given by way of example and with reference to theaccompanying drawing, of a preferred arrangement for withdrawing such aninternal work supporting plate as has been referred to and of apreferred form of plate.

In the drawing:- Figure l is a front elevation of part of a bag cornersewing machine of the general kind referred to in the applicationhereinbefore referred to, when viewed across the lower face of the worksupport and embodying the said preferred arrangement and preferred formof plate;

Figure 2 is a plan view of some of the parts shown in Figure 1;

Figure 3 is a detail view partly in section showing a latching device insaid arrangement; and Figure 4 is a sectional view on the line 4-4 ofFigure l. V

The external work support, indicated at 1, is provided with surfaceswhich engage the external faces of the parts of the bag to be sewntogether and which are arranged at an angle to each other so as tosupport the work with both faces adjacent a corner at an inclination toand intersecting the needle path. The external work support 1 has formedin it a recess 2 and a slot 3 in which a block 4 is slidably mounted formovement back and forth in the direction of feed of the work.

To the block 4 is secured a plate 5 which projects in the direction offeed between the edges of the parts to be sewn together and which formsan internal worksupport for the parts. Oneface of this internal worksupport cooperates with one surface of the external work support 1 tohold one of the work parts 6 in position, as indicated in Figure 4, andthe lower edge of this internal work support cooperates with the othersurface of the external work support to hold the other work part '7 inposition. As so far described, the parts referred to are constructed andarranged to operate as in the machine of the pending application abovereferred to.

In the illustrated embodiment of the present invention the block 4 towhich the plate 5 is secured is extended to the right when looked atfrom the front, and at this right hand end has a depending arm 8 whichengages between projections 9 on a member 10 slidably mounted on ahorizontal bar 11 extending across the machine parallel to the line offeed, and fixed at its left hand end to the awl feed slide, part ofwhich is shown at 12. The arm 8 and projections 9 allow of the angularadjustment of the external Work support 1. A spring 13 in the member 10bears against the end of the bar 11 and tends to move the member 10 andplate 5 to the right in Figure 1. The member 10 has pivoted on it at 14a latch 15 adapted, when the plate 5 is in operative position, to beheld in engagement with a recess 16 in the bar 11 by a spring 17 to lockthe member 10 and bar 11 together so that the plate 5 moves with the awl18 in its feeding movements. When the latch is released from the recess16 in the bar 11 the member 10 and plate 5 are moved by the spring 13 tothe right (Figure 1) so that the plate 5 is withdrawn from the workalong the line of feed and moved about three-quarters of an inch to theright from its operative position into an inoperative position where itdoes not interfere with the continued operation of the machine.

The said preferred form of plate 5 is of a stiff springy nature and itsleft hand end presses one part of the bag against the face 19 of the ex-0 ternal work support and holds it sufficiently to support the workpieceagainst the thrust of the needle without the workpiece being backed by ahorn so that in this arrangement it is not necessary that a horn beused. When the plate 5 is 9 moved into its inoperative position itsleft-hand end springs back behind the face 19 so as to allow the bagthen being sewn without the aid of the plate to pass in front of it.When the plate 5 is moved into operative position its left-hand endslides over an inclined face 20 which guides it on to the face 19. Theleft-hand end of the plate is extended as shown at 21 aboutnve-sixteenths of an inch to the left so as to give added support to theworkpiece above the points of penetration of the awl and needle and thelower edge of the plate where part of the bag passes beneath it is bentforwardly as shown at 22. When the plate has been moved into itsinoperative position the operator holds the bag against the externalsupporting means while the sewing is completed.

The invention having been thus described, what is claimed is:

1. In a machine for sewing bags or similar articles, an external worksupport provided with surfaces arranged to support the work with bothfaces adjacent a corner at an inclination to and intersecting the needlepath, an internal work support passing between the edges of the partsbeing sewn together, and means for retaining the internal work supportin operative position while permitting its withdrawal from worksupporting position and from between the edges of the work parts duringthe sewing operation.

2. In a machine for sewing bags or similar articles, an external worksupport provided with surfaces arranged to support the work with bothfaces adjacent a corner at an inclination to and g, intersecting theneedle path, an internal work being sewn together, a feed slide and aconnection between the feed slide and the internal work support foractuating the internal work support from the slide while permitting anactuation, under the control of the operator, of the internal worksupport during the sewing operation to withdraw the internal worksupport from work supporting position and from between the edges of thework parts.

3. In a machine for sewing bags or similar articles, an external worksupport provided with surfaces arranged to support the work with bothfaces adjacent a corner at an inclination to and intersecting the'needlepath, a feed slide, an internal work supporting plate passing betweenthe edges of the parts being sewn together, a slide mounted in theexternal work support to which said plate is secured, and meansincluding a manually operable latch detachably connecting said lastmentioned slide and the feed slide.

4. In a machine for sewing bags or similar articles, an external worksupport provided with surfaces arranged to support the work with bothfaces adjacent a corner at an inclination to and intersecting the needlepath, and an internal Work support comprising a plate extending in thedirection of feed between the parts being sewn together, said platehaving a portion extending across the plane of the awl and needle paths.

' FRED RICKS.

